差不多写完了，真是无语了，难啊！转换难啊，从HSE 8MHZ到168MHZ
;Reset the RCC, RCC->CR |= (uint32_t)0x00000001;
LDR R3,=RCC_CR
LDR R1,[R3] ;Get the value of RCC_CR default value, R1=[R3]
ORR R1,R1,#0x00000001
STR R1,[R3]
LDR R3,=RCC_CFG ;CFGR RESET
LDR R1,=0x00000000;R1->[R3]
STR R1,[R3]
LDR R3,=RCC_CR ;0X7A83 RCC->CR &= (uint32_t)0xFEF6FFFF;
LDR R1,[R3]
LDR R0,=0xFEF6FFFF
AND R1,R1,R0
STR R1,[R3]
LDR R3,=RCC_CFGR ;CFGR RESET
LDR R1,=0x24003010
STR R1,[R3]
LDR R3,=RCC_CR ;RCC->CR &= (uint32_t)0xFFFBFFFF;
LDR R1,[R3]
LDR R0,=0xFFFBFFFF
AND R1,R1,R0
STR R1,[R3]
LDR R3,=RCC_CIR ;CFGR RESET
LDR R1,=0x00000000
STR R1,[R3]
saclk
LDR R3,=RCC_CR ;Turon on HSE
LDR R1,[R3]
ORR R1,R1,#0x00010000
STR R1,[R3]
LDR R0,=0x00000000 ;HSEStatus = RCC->CR & RCC_CR_HSERDY;
;StartUpCounter++; while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT));
secondorde
LDR R3,=RCC_CR
LDR R1,[R3] ;RR1=[RCC_CR]
AND R1,R1,#0x00020000
ADD R0,R0,#0x00000001
CMP R1,#0
BEQ secondorde
CMP R0,#0x0500
BNE secondorde
NOP
;LDR R1,=0x000000001
pwrse
LDR R0,=RCC_APB1
LDR R1,[R0]
ORR R1,R1,#0x10000000
STR R1,[R0]
LDR R0,=0x40007000
LDR R1,[R0]
ORR R1,R1,#0x0004000
STR R1,[R0]
;CFGR/* HCLK = SYSCLK / 1*/
;
LDR R0,=RCC_CFG
LDR R1,[R0]
ORR R1,R1,#0x00000000
STR R1,[R0]
; /* PCLK2 = HCLK / 2*/
LDR R1,=RCC_CFG
LDR R0,[R1]; r0=[rccS]
ORR R0,R0,#0x00008000
STR R0,[R1]
; /* PCLK1 = HCLK / 4*/
LDR R1,=RCC_CFG
LDR R0,[R1]; r0=[rccS]
ORR R0,R0,#0x00001400
STR R0,[R1]
;Main PLL
LDR R0,=RCC_CFGR
LDR R1,[R0]
LDR R2,=0x07405408
MOV R1,R2
STR R1,[R0]
;eANBLE PLL
LDR R0,=RCC_CR
LDR R1,[R0]
ORR R1,R1,#0x01000000
STR R1,[R0]
;Wait until the main PLL
greatpll
LDR R0,=RCC_CR
LDR R1,[R0]
AND R1,R1,#0x02000000
CMP r1,#0
BEQ greatpll
;FLASh Acr
LDR R0,=FLASH_ACR
LDR R1,[R0]
LDR R2,=0x00000605
MOV R1,R2
STR R1,[R0]
;RCC_CFG
LDR R0,=RCC_CFG
LDR r1,[R0]
LDR R2,=0x0000940A
MOV R1,R2
;wiat till PLl
Waitman
LDR R0,=RCC_CFG
LDR R1,[R0]
AND R1,R1,#0x000000C
CMP R1,#0x000000C
BNE Waitman